./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 39463d01f5c85d47bf5e231172595e96b8ff556c59c4a9ab8cf46a88a393b05c --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 23:31:25,616 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 23:31:25,717 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-13 23:31:25,724 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 23:31:25,724 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 23:31:25,767 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 23:31:25,768 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 23:31:25,768 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 23:31:25,768 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 23:31:25,768 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 23:31:25,768 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-13 23:31:25,768 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-13 23:31:25,769 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-13 23:31:25,769 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-13 23:31:25,769 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-13 23:31:25,769 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-13 23:31:25,769 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-13 23:31:25,769 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-13 23:31:25,769 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-13 23:31:25,769 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-13 23:31:25,772 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-13 23:31:25,772 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-13 23:31:25,773 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 23:31:25,773 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 23:31:25,773 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 23:31:25,773 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 23:31:25,773 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 23:31:25,773 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 23:31:25,774 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 23:31:25,774 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 23:31:25,774 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 23:31:25,774 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 23:31:25,774 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 23:31:25,774 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 23:31:25,774 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 23:31:25,774 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 23:31:25,774 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 23:31:25,774 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 23:31:25,774 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-13 23:31:25,775 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 23:31:25,775 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 23:31:25,775 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 23:31:25,775 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-13 23:31:25,775 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 23:31:25,775 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 23:31:25,775 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-13 23:31:25,775 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 23:31:25,775 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39463d01f5c85d47bf5e231172595e96b8ff556c59c4a9ab8cf46a88a393b05c [2024-11-13 23:31:26,074 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 23:31:26,082 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 23:31:26,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 23:31:26,086 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 23:31:26,086 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 23:31:26,087 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c Unable to find full path for "g++" [2024-11-13 23:31:27,982 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 23:31:28,219 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 23:31:28,219 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c [2024-11-13 23:31:28,227 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/data/f396e20e4/2311f1ec6dff4d098fea0d7f8f0907c4/FLAG8947e1fe9 [2024-11-13 23:31:28,252 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/data/f396e20e4/2311f1ec6dff4d098fea0d7f8f0907c4 [2024-11-13 23:31:28,254 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 23:31:28,256 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 23:31:28,257 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 23:31:28,257 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 23:31:28,269 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 23:31:28,270 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 11:31:28" (1/1) ... [2024-11-13 23:31:28,271 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b6d04a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:31:28, skipping insertion in model container [2024-11-13 23:31:28,271 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 11:31:28" (1/1) ... [2024-11-13 23:31:28,321 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 23:31:28,510 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c[465,478] [2024-11-13 23:31:28,536 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 23:31:28,548 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 23:31:28,559 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c[465,478] [2024-11-13 23:31:28,574 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 23:31:28,587 INFO L204 MainTranslator]: Completed translation [2024-11-13 23:31:28,587 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:31:28 WrapperNode [2024-11-13 23:31:28,588 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 23:31:28,588 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 23:31:28,588 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 23:31:28,589 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 23:31:28,595 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:31:28" (1/1) ... [2024-11-13 23:31:28,601 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:31:28" (1/1) ... [2024-11-13 23:31:28,620 INFO L138 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 60 [2024-11-13 23:31:28,622 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 23:31:28,622 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 23:31:28,622 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 23:31:28,623 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 23:31:28,631 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:31:28" (1/1) ... [2024-11-13 23:31:28,631 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:31:28" (1/1) ... [2024-11-13 23:31:28,632 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:31:28" (1/1) ... [2024-11-13 23:31:28,632 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:31:28" (1/1) ... [2024-11-13 23:31:28,636 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:31:28" (1/1) ... [2024-11-13 23:31:28,644 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:31:28" (1/1) ... [2024-11-13 23:31:28,646 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:31:28" (1/1) ... [2024-11-13 23:31:28,647 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:31:28" (1/1) ... [2024-11-13 23:31:28,649 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 23:31:28,653 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 23:31:28,653 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 23:31:28,653 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 23:31:28,654 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:31:28" (1/1) ... [2024-11-13 23:31:28,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-13 23:31:28,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:31:28,692 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-13 23:31:28,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-13 23:31:28,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 23:31:28,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-13 23:31:28,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 23:31:28,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 23:31:28,800 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 23:31:28,802 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 23:31:28,994 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-11-13 23:31:28,995 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 23:31:29,119 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 23:31:29,119 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-13 23:31:29,119 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 11:31:29 BoogieIcfgContainer [2024-11-13 23:31:29,119 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 23:31:29,122 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 23:31:29,122 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 23:31:29,127 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 23:31:29,127 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 11:31:28" (1/3) ... [2024-11-13 23:31:29,127 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3580a24a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 11:31:29, skipping insertion in model container [2024-11-13 23:31:29,132 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:31:28" (2/3) ... [2024-11-13 23:31:29,132 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3580a24a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 11:31:29, skipping insertion in model container [2024-11-13 23:31:29,132 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 11:31:29" (3/3) ... [2024-11-13 23:31:29,133 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_delay_nd.c [2024-11-13 23:31:29,148 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 23:31:29,152 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG nested_delay_nd.c that has 1 procedures, 8 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-13 23:31:29,219 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 23:31:29,236 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@646f655f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 23:31:29,237 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-13 23:31:29,241 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:31:29,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-13 23:31:29,249 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:31:29,251 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-13 23:31:29,251 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:31:29,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:31:29,256 INFO L85 PathProgramCache]: Analyzing trace with hash 107731047, now seen corresponding path program 1 times [2024-11-13 23:31:29,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:31:29,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758882975] [2024-11-13 23:31:29,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:31:29,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:31:29,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:31:29,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:31:29,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:31:29,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758882975] [2024-11-13 23:31:29,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758882975] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:31:29,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:31:29,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 23:31:29,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067762705] [2024-11-13 23:31:29,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:31:29,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:31:29,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:31:29,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:31:29,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:31:29,602 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:31:29,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:31:29,655 INFO L93 Difference]: Finished difference Result 15 states and 21 transitions. [2024-11-13 23:31:29,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 23:31:29,658 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-13 23:31:29,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:31:29,666 INFO L225 Difference]: With dead ends: 15 [2024-11-13 23:31:29,666 INFO L226 Difference]: Without dead ends: 8 [2024-11-13 23:31:29,669 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:31:29,672 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:31:29,674 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 9 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 23:31:29,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2024-11-13 23:31:29,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2024-11-13 23:31:29,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:31:29,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2024-11-13 23:31:29,708 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2024-11-13 23:31:29,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:31:29,708 INFO L471 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2024-11-13 23:31:29,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:31:29,708 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2024-11-13 23:31:29,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-13 23:31:29,709 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:31:29,709 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-13 23:31:29,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 23:31:29,709 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:31:29,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:31:29,710 INFO L85 PathProgramCache]: Analyzing trace with hash -955568151, now seen corresponding path program 1 times [2024-11-13 23:31:29,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:31:29,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297515001] [2024-11-13 23:31:29,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:31:29,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:31:29,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:31:29,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:31:29,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:31:29,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297515001] [2024-11-13 23:31:29,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297515001] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:31:29,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623627469] [2024-11-13 23:31:29,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:31:29,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:31:29,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:31:29,911 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:31:29,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 23:31:29,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:31:29,986 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 23:31:29,989 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:31:30,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:31:30,078 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:31:30,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:31:30,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623627469] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:31:30,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1530847868] [2024-11-13 23:31:30,156 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-13 23:31:30,157 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:31:30,160 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:31:30,164 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:31:30,165 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:31:30,751 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:31:31,452 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '88#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~last~0) (= ~SIZE~0 200000) (exists ((|v_ULTIMATE.start_main_~st~0#1_60| Int) (|v_ULTIMATE.start_main_#t~post6#1_38| Int) (|v_ULTIMATE.start_main_~c~0#1_56| Int) (|v_ULTIMATE.start_main_~a~0#1_48| Int) (|v_ULTIMATE.start_main_~b~0#1_40| Int) (|v_ULTIMATE.start_main_~a~0#1_49| Int)) (and (= |v_ULTIMATE.start_main_~b~0#1_40| |ULTIMATE.start_main_~b~0#1|) (<= |v_ULTIMATE.start_main_~st~0#1_60| 1) (= |ULTIMATE.start_main_~a~0#1| |v_ULTIMATE.start_main_~a~0#1_49|) (or (and (= |v_ULTIMATE.start_main_~b~0#1_40| 2) (= 2 |v_ULTIMATE.start_main_~a~0#1_48|) (or (not (= (+ ~last~0 1) |v_ULTIMATE.start_main_~c~0#1_56|)) (not (= |v_ULTIMATE.start_main_~st~0#1_60| 0)))) (and (= |v_ULTIMATE.start_main_~b~0#1_40| 3) (= (+ ~last~0 1) |v_ULTIMATE.start_main_~c~0#1_56|) (= |v_ULTIMATE.start_main_~st~0#1_60| 0) (= 3 |v_ULTIMATE.start_main_~a~0#1_48|))) (or (not (= |v_ULTIMATE.start_main_~c~0#1_56| 200000)) (not (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (<= 200000 |v_ULTIMATE.start_main_~c~0#1_56|) (or (and (or (and (= |ULTIMATE.start_main_~d~0#1| 1) (= |v_ULTIMATE.start_main_~st~0#1_60| 1) (<= ~last~0 199999)) (and (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_38|) (or (< 199999 ~last~0) (not (= |v_ULTIMATE.start_main_~st~0#1_60| 1))) (= |ULTIMATE.start_main_~d~0#1| 0))) (= |v_ULTIMATE.start_main_~a~0#1_49| |v_ULTIMATE.start_main_~a~0#1_48|) (or (not (= |v_ULTIMATE.start_main_~st~0#1_60| 0)) (not (= ~last~0 |v_ULTIMATE.start_main_~c~0#1_56|)))) (and (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_38|) (= ~last~0 |v_ULTIMATE.start_main_~c~0#1_56|) (= |ULTIMATE.start_main_~d~0#1| 0) (= |v_ULTIMATE.start_main_~st~0#1_60| 0) (= (+ |v_ULTIMATE.start_main_~a~0#1_48| 1) |v_ULTIMATE.start_main_~a~0#1_49|))))) (<= ~last~0 2147483647))' at error location [2024-11-13 23:31:31,453 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:31:31,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:31:31,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-13 23:31:31,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492763798] [2024-11-13 23:31:31,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:31:31,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 23:31:31,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:31:31,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 23:31:31,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-13 23:31:31,456 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:31:31,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:31:31,523 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2024-11-13 23:31:31,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 23:31:31,524 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-13 23:31:31,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:31:31,524 INFO L225 Difference]: With dead ends: 18 [2024-11-13 23:31:31,524 INFO L226 Difference]: Without dead ends: 11 [2024-11-13 23:31:31,525 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2024-11-13 23:31:31,526 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:31:31,526 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 17 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 23:31:31,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2024-11-13 23:31:31,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2024-11-13 23:31:31,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:31:31,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2024-11-13 23:31:31,530 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2024-11-13 23:31:31,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:31:31,530 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2024-11-13 23:31:31,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:31:31,530 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2024-11-13 23:31:31,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-13 23:31:31,531 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:31:31,531 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2024-11-13 23:31:31,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-13 23:31:31,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:31:31,735 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:31:31,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:31:31,736 INFO L85 PathProgramCache]: Analyzing trace with hash -549017369, now seen corresponding path program 2 times [2024-11-13 23:31:31,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:31:31,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348654764] [2024-11-13 23:31:31,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:31:31,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:31:31,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:31:31,925 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:31:31,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:31:31,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348654764] [2024-11-13 23:31:31,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348654764] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:31:31,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928284263] [2024-11-13 23:31:31,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:31:31,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:31:31,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:31:31,929 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:31:31,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 23:31:31,992 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 23:31:31,992 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:31:31,993 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 23:31:31,994 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:31:32,090 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:31:32,090 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:31:32,193 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:31:32,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928284263] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:31:32,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [546126050] [2024-11-13 23:31:32,196 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-13 23:31:32,196 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:31:32,196 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:31:32,197 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:31:32,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:31:32,507 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:31:33,111 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '207#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~last~0) (= ~SIZE~0 200000) (<= ~last~0 2147483647) (exists ((|v_ULTIMATE.start_main_~st~0#1_69| Int) (|v_ULTIMATE.start_main_~c~0#1_70| Int) (|v_ULTIMATE.start_main_~a~0#1_48| Int) (|v_ULTIMATE.start_main_~b~0#1_40| Int) (|v_ULTIMATE.start_main_~a~0#1_49| Int) (|v_ULTIMATE.start_main_#t~post6#1_40| Int)) (and (or (and (= |v_ULTIMATE.start_main_~st~0#1_69| 0) (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_40|) (= |ULTIMATE.start_main_~d~0#1| 0) (= ~last~0 |v_ULTIMATE.start_main_~c~0#1_70|) (= (+ |v_ULTIMATE.start_main_~a~0#1_48| 1) |v_ULTIMATE.start_main_~a~0#1_49|)) (and (or (and (= |ULTIMATE.start_main_~d~0#1| 1) (<= ~last~0 199999) (= |v_ULTIMATE.start_main_~st~0#1_69| 1)) (and (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_40|) (= |ULTIMATE.start_main_~d~0#1| 0) (or (< 199999 ~last~0) (not (= |v_ULTIMATE.start_main_~st~0#1_69| 1))))) (= |v_ULTIMATE.start_main_~a~0#1_49| |v_ULTIMATE.start_main_~a~0#1_48|) (or (not (= ~last~0 |v_ULTIMATE.start_main_~c~0#1_70|)) (not (= |v_ULTIMATE.start_main_~st~0#1_69| 0))))) (= |v_ULTIMATE.start_main_~b~0#1_40| |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~a~0#1| |v_ULTIMATE.start_main_~a~0#1_49|) (or (not (= |v_ULTIMATE.start_main_~c~0#1_70| 200000)) (not (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (or (and (or (not (= (+ ~last~0 1) |v_ULTIMATE.start_main_~c~0#1_70|)) (not (= |v_ULTIMATE.start_main_~st~0#1_69| 0))) (= |v_ULTIMATE.start_main_~b~0#1_40| 2) (= 2 |v_ULTIMATE.start_main_~a~0#1_48|)) (and (= |v_ULTIMATE.start_main_~b~0#1_40| 3) (= |v_ULTIMATE.start_main_~st~0#1_69| 0) (= (+ ~last~0 1) |v_ULTIMATE.start_main_~c~0#1_70|) (= 3 |v_ULTIMATE.start_main_~a~0#1_48|))) (<= 200000 |v_ULTIMATE.start_main_~c~0#1_70|) (<= |v_ULTIMATE.start_main_~st~0#1_69| 1))))' at error location [2024-11-13 23:31:33,112 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:31:33,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:31:33,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2024-11-13 23:31:33,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614469468] [2024-11-13 23:31:33,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:31:33,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-13 23:31:33,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:31:33,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-13 23:31:33,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2024-11-13 23:31:33,114 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:31:33,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:31:33,280 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2024-11-13 23:31:33,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 23:31:33,281 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-13 23:31:33,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:31:33,281 INFO L225 Difference]: With dead ends: 27 [2024-11-13 23:31:33,282 INFO L226 Difference]: Without dead ends: 17 [2024-11-13 23:31:33,282 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2024-11-13 23:31:33,283 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 24 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:31:33,283 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 25 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 23:31:33,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-13 23:31:33,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-13 23:31:33,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:31:33,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2024-11-13 23:31:33,287 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2024-11-13 23:31:33,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:31:33,288 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2024-11-13 23:31:33,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:31:33,288 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2024-11-13 23:31:33,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-13 23:31:33,289 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:31:33,289 INFO L215 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2024-11-13 23:31:33,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 23:31:33,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:31:33,493 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:31:33,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:31:33,493 INFO L85 PathProgramCache]: Analyzing trace with hash -128194137, now seen corresponding path program 3 times [2024-11-13 23:31:33,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:31:33,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333424016] [2024-11-13 23:31:33,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:31:33,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:31:33,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:31:33,804 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:31:33,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:31:33,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333424016] [2024-11-13 23:31:33,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333424016] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:31:33,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987818937] [2024-11-13 23:31:33,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:31:33,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:31:33,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:31:33,808 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:31:33,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 23:31:33,872 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:31:33,872 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:31:33,873 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-13 23:31:33,875 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:31:34,109 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:31:34,110 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:31:34,431 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:31:34,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987818937] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:31:34,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2083284367] [2024-11-13 23:31:34,434 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-13 23:31:34,434 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:31:34,435 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:31:34,435 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:31:34,435 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:31:34,622 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:31:35,170 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '416#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~last~0) (exists ((|v_ULTIMATE.start_main_#t~post6#1_42| Int) (|v_ULTIMATE.start_main_~st~0#1_84| Int) (|v_ULTIMATE.start_main_~a~0#1_48| Int) (|v_ULTIMATE.start_main_~b~0#1_40| Int) (|v_ULTIMATE.start_main_~a~0#1_49| Int) (|v_ULTIMATE.start_main_~c~0#1_96| Int)) (and (= |v_ULTIMATE.start_main_~b~0#1_40| |ULTIMATE.start_main_~b~0#1|) (<= |v_ULTIMATE.start_main_~st~0#1_84| 1) (= |ULTIMATE.start_main_~a~0#1| |v_ULTIMATE.start_main_~a~0#1_49|) (or (and (= |v_ULTIMATE.start_main_~st~0#1_84| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_42|) (= ~last~0 |v_ULTIMATE.start_main_~c~0#1_96|) (= (+ |v_ULTIMATE.start_main_~a~0#1_48| 1) |v_ULTIMATE.start_main_~a~0#1_49|)) (and (or (not (= ~last~0 |v_ULTIMATE.start_main_~c~0#1_96|)) (not (= |v_ULTIMATE.start_main_~st~0#1_84| 0))) (= |v_ULTIMATE.start_main_~a~0#1_49| |v_ULTIMATE.start_main_~a~0#1_48|) (or (and (= |ULTIMATE.start_main_~d~0#1| 1) (<= ~last~0 199999) (= |v_ULTIMATE.start_main_~st~0#1_84| 1)) (and (or (< 199999 ~last~0) (not (= |v_ULTIMATE.start_main_~st~0#1_84| 1))) (= |ULTIMATE.start_main_~d~0#1| 0) (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_42|))))) (or (not (= |v_ULTIMATE.start_main_~c~0#1_96| 200000)) (not (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (or (and (= |v_ULTIMATE.start_main_~b~0#1_40| 2) (= 2 |v_ULTIMATE.start_main_~a~0#1_48|) (or (not (= (+ ~last~0 1) |v_ULTIMATE.start_main_~c~0#1_96|)) (not (= |v_ULTIMATE.start_main_~st~0#1_84| 0)))) (and (= |v_ULTIMATE.start_main_~st~0#1_84| 0) (= (+ ~last~0 1) |v_ULTIMATE.start_main_~c~0#1_96|) (= |v_ULTIMATE.start_main_~b~0#1_40| 3) (= 3 |v_ULTIMATE.start_main_~a~0#1_48|))) (<= 200000 |v_ULTIMATE.start_main_~c~0#1_96|))) (= ~SIZE~0 200000) (<= ~last~0 2147483647))' at error location [2024-11-13 23:31:35,171 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:31:35,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:31:35,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2024-11-13 23:31:35,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434127870] [2024-11-13 23:31:35,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:31:35,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-13 23:31:35,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:31:35,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-13 23:31:35,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=1045, Unknown=0, NotChecked=0, Total=1640 [2024-11-13 23:31:35,176 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 37 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:31:35,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:31:35,590 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2024-11-13 23:31:35,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-13 23:31:35,592 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-13 23:31:35,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:31:35,593 INFO L225 Difference]: With dead ends: 45 [2024-11-13 23:31:35,593 INFO L226 Difference]: Without dead ends: 29 [2024-11-13 23:31:35,595 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=892, Invalid=1760, Unknown=0, NotChecked=0, Total=2652 [2024-11-13 23:31:35,596 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 36 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:31:35,596 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 21 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:31:35,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-13 23:31:35,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-13 23:31:35,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:31:35,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2024-11-13 23:31:35,602 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 15 [2024-11-13 23:31:35,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:31:35,602 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2024-11-13 23:31:35,602 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:31:35,603 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2024-11-13 23:31:35,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-13 23:31:35,603 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:31:35,603 INFO L215 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1] [2024-11-13 23:31:35,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 23:31:35,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:31:35,805 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:31:35,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:31:35,805 INFO L85 PathProgramCache]: Analyzing trace with hash 782744359, now seen corresponding path program 4 times [2024-11-13 23:31:35,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:31:35,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43615617] [2024-11-13 23:31:35,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:31:35,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:31:35,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:31:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:31:36,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:31:36,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43615617] [2024-11-13 23:31:36,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43615617] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:31:36,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092439434] [2024-11-13 23:31:36,646 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 23:31:36,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:31:36,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:31:36,648 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:31:36,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 23:31:36,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:31:36,712 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 23:31:36,714 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:31:37,302 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:31:37,302 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:31:38,362 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:31:38,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092439434] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:31:38,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1592331237] [2024-11-13 23:31:38,366 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-13 23:31:38,367 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:31:38,367 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:31:38,368 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:31:38,368 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:31:38,546 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:31:39,078 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '805#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~last~0) (= ~SIZE~0 200000) (exists ((|v_ULTIMATE.start_main_~c~0#1_146| Int) (|v_ULTIMATE.start_main_#t~post6#1_44| Int) (|v_ULTIMATE.start_main_~st~0#1_111| Int) (|v_ULTIMATE.start_main_~a~0#1_48| Int) (|v_ULTIMATE.start_main_~b~0#1_40| Int) (|v_ULTIMATE.start_main_~a~0#1_49| Int)) (and (or (and (= |v_ULTIMATE.start_main_~st~0#1_111| 0) (= |v_ULTIMATE.start_main_~b~0#1_40| 3) (= |v_ULTIMATE.start_main_~c~0#1_146| (+ ~last~0 1)) (= 3 |v_ULTIMATE.start_main_~a~0#1_48|)) (and (= |v_ULTIMATE.start_main_~b~0#1_40| 2) (= 2 |v_ULTIMATE.start_main_~a~0#1_48|) (or (not (= |v_ULTIMATE.start_main_~st~0#1_111| 0)) (not (= |v_ULTIMATE.start_main_~c~0#1_146| (+ ~last~0 1)))))) (= |v_ULTIMATE.start_main_~b~0#1_40| |ULTIMATE.start_main_~b~0#1|) (<= 200000 |v_ULTIMATE.start_main_~c~0#1_146|) (<= |v_ULTIMATE.start_main_~st~0#1_111| 1) (= |ULTIMATE.start_main_~a~0#1| |v_ULTIMATE.start_main_~a~0#1_49|) (or (and (= |v_ULTIMATE.start_main_~st~0#1_111| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= ~last~0 |v_ULTIMATE.start_main_~c~0#1_146|) (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_44|) (= (+ |v_ULTIMATE.start_main_~a~0#1_48| 1) |v_ULTIMATE.start_main_~a~0#1_49|)) (and (or (not (= ~last~0 |v_ULTIMATE.start_main_~c~0#1_146|)) (not (= |v_ULTIMATE.start_main_~st~0#1_111| 0))) (= |v_ULTIMATE.start_main_~a~0#1_49| |v_ULTIMATE.start_main_~a~0#1_48|) (or (and (= |ULTIMATE.start_main_~d~0#1| 0) (or (< 199999 ~last~0) (not (= |v_ULTIMATE.start_main_~st~0#1_111| 1))) (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_44|)) (and (= |ULTIMATE.start_main_~d~0#1| 1) (<= ~last~0 199999) (= |v_ULTIMATE.start_main_~st~0#1_111| 1))))) (or (not (= |v_ULTIMATE.start_main_~c~0#1_146| 200000)) (not (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))))) (<= ~last~0 2147483647))' at error location [2024-11-13 23:31:39,078 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:31:39,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:31:39,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 72 [2024-11-13 23:31:39,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029234526] [2024-11-13 23:31:39,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:31:39,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-11-13 23:31:39,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:31:39,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-11-13 23:31:39,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2323, Invalid=3529, Unknown=0, NotChecked=0, Total=5852 [2024-11-13 23:31:39,084 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 73 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 72 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:31:40,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:31:40,253 INFO L93 Difference]: Finished difference Result 81 states and 107 transitions. [2024-11-13 23:31:40,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-13 23:31:40,254 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 72 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-13 23:31:40,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:31:40,254 INFO L225 Difference]: With dead ends: 81 [2024-11-13 23:31:40,254 INFO L226 Difference]: Without dead ends: 53 [2024-11-13 23:31:40,259 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3677 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3496, Invalid=6404, Unknown=0, NotChecked=0, Total=9900 [2024-11-13 23:31:40,260 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 60 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:31:40,260 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 33 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:31:40,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-13 23:31:40,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-11-13 23:31:40,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:31:40,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2024-11-13 23:31:40,273 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 27 [2024-11-13 23:31:40,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:31:40,274 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2024-11-13 23:31:40,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 72 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:31:40,275 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2024-11-13 23:31:40,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-13 23:31:40,276 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:31:40,276 INFO L215 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1] [2024-11-13 23:31:40,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 23:31:40,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:31:40,477 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:31:40,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:31:40,477 INFO L85 PathProgramCache]: Analyzing trace with hash -762012121, now seen corresponding path program 5 times [2024-11-13 23:31:40,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:31:40,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707544706] [2024-11-13 23:31:40,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:31:40,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:31:40,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:31:42,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:31:42,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:31:42,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707544706] [2024-11-13 23:31:42,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707544706] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:31:42,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351510088] [2024-11-13 23:31:42,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:31:42,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:31:42,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:31:42,880 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:31:42,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 23:31:43,005 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2024-11-13 23:31:43,005 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:31:43,008 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-13 23:31:43,016 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:31:44,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:31:44,494 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:31:47,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:31:47,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351510088] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:31:47,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1717614918] [2024-11-13 23:31:47,643 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-13 23:31:47,643 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:31:47,643 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:31:47,644 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:31:47,644 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:31:47,813 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:31:48,446 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1554#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~last~0) (= ~SIZE~0 200000) (exists ((|v_ULTIMATE.start_main_~st~0#1_162| Int) (|v_ULTIMATE.start_main_~c~0#1_244| Int) (|v_ULTIMATE.start_main_#t~post6#1_46| Int) (|v_ULTIMATE.start_main_~a~0#1_48| Int) (|v_ULTIMATE.start_main_~b~0#1_40| Int) (|v_ULTIMATE.start_main_~a~0#1_49| Int)) (and (or (not (= |v_ULTIMATE.start_main_~c~0#1_244| 200000)) (not (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (= |v_ULTIMATE.start_main_~b~0#1_40| |ULTIMATE.start_main_~b~0#1|) (<= |v_ULTIMATE.start_main_~st~0#1_162| 1) (= |ULTIMATE.start_main_~a~0#1| |v_ULTIMATE.start_main_~a~0#1_49|) (or (and (= |v_ULTIMATE.start_main_~b~0#1_40| 2) (= 2 |v_ULTIMATE.start_main_~a~0#1_48|) (or (not (= |v_ULTIMATE.start_main_~c~0#1_244| (+ ~last~0 1))) (not (= |v_ULTIMATE.start_main_~st~0#1_162| 0)))) (and (= |v_ULTIMATE.start_main_~st~0#1_162| 0) (= |v_ULTIMATE.start_main_~b~0#1_40| 3) (= |v_ULTIMATE.start_main_~c~0#1_244| (+ ~last~0 1)) (= 3 |v_ULTIMATE.start_main_~a~0#1_48|))) (<= 200000 |v_ULTIMATE.start_main_~c~0#1_244|) (or (and (or (not (= ~last~0 |v_ULTIMATE.start_main_~c~0#1_244|)) (not (= |v_ULTIMATE.start_main_~st~0#1_162| 0))) (or (and (= |ULTIMATE.start_main_~d~0#1| 1) (<= ~last~0 199999) (= |v_ULTIMATE.start_main_~st~0#1_162| 1)) (and (or (< 199999 ~last~0) (not (= |v_ULTIMATE.start_main_~st~0#1_162| 1))) (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_46|) (= |ULTIMATE.start_main_~d~0#1| 0))) (= |v_ULTIMATE.start_main_~a~0#1_49| |v_ULTIMATE.start_main_~a~0#1_48|)) (and (= ~last~0 |v_ULTIMATE.start_main_~c~0#1_244|) (= |v_ULTIMATE.start_main_~st~0#1_162| 0) (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_46|) (= |ULTIMATE.start_main_~d~0#1| 0) (= (+ |v_ULTIMATE.start_main_~a~0#1_48| 1) |v_ULTIMATE.start_main_~a~0#1_49|))))) (<= ~last~0 2147483647))' at error location [2024-11-13 23:31:48,446 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:31:48,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:31:48,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 144 [2024-11-13 23:31:48,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97723566] [2024-11-13 23:31:48,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:31:48,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2024-11-13 23:31:48,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:31:48,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2024-11-13 23:31:48,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9235, Invalid=12817, Unknown=0, NotChecked=0, Total=22052 [2024-11-13 23:31:48,457 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 145 states, 145 states have (on average 1.0206896551724138) internal successors, (148), 144 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:31:52,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:31:52,051 INFO L93 Difference]: Finished difference Result 153 states and 203 transitions. [2024-11-13 23:31:52,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2024-11-13 23:31:52,052 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 1.0206896551724138) internal successors, (148), 144 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2024-11-13 23:31:52,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:31:52,054 INFO L225 Difference]: With dead ends: 153 [2024-11-13 23:31:52,054 INFO L226 Difference]: Without dead ends: 101 [2024-11-13 23:31:52,061 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14285 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=13888, Invalid=24332, Unknown=0, NotChecked=0, Total=38220 [2024-11-13 23:31:52,062 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 54 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:31:52,062 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 41 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 23:31:52,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-13 23:31:52,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2024-11-13 23:31:52,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:31:52,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2024-11-13 23:31:52,079 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 51 [2024-11-13 23:31:52,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:31:52,079 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2024-11-13 23:31:52,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 1.0206896551724138) internal successors, (148), 144 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:31:52,080 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2024-11-13 23:31:52,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-13 23:31:52,082 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:31:52,082 INFO L215 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1] [2024-11-13 23:31:52,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 23:31:52,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:31:52,286 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:31:52,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:31:52,287 INFO L85 PathProgramCache]: Analyzing trace with hash -431791065, now seen corresponding path program 6 times [2024-11-13 23:31:52,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:31:52,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318422611] [2024-11-13 23:31:52,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:31:52,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:31:52,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:31:59,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:31:59,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:31:59,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318422611] [2024-11-13 23:31:59,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318422611] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:31:59,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987693224] [2024-11-13 23:31:59,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:31:59,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:31:59,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:31:59,267 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:31:59,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 23:31:59,392 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:31:59,392 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:31:59,396 INFO L255 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-11-13 23:31:59,401 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:32:04,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:32:04,455 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:32:17,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:32:17,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987693224] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:32:17,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1190933860] [2024-11-13 23:32:17,313 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-13 23:32:17,313 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:32:17,313 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:32:17,313 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:32:17,313 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:32:17,437 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:32:18,340 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3023#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~last~0) (= ~SIZE~0 200000) (exists ((|v_ULTIMATE.start_main_~st~0#1_261| Int) (|v_ULTIMATE.start_main_#t~post6#1_48| Int) (|v_ULTIMATE.start_main_~c~0#1_438| Int) (|v_ULTIMATE.start_main_~a~0#1_48| Int) (|v_ULTIMATE.start_main_~b~0#1_40| Int) (|v_ULTIMATE.start_main_~a~0#1_49| Int)) (and (or (not (= |v_ULTIMATE.start_main_~c~0#1_438| 200000)) (not (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (= |v_ULTIMATE.start_main_~b~0#1_40| |ULTIMATE.start_main_~b~0#1|) (or (and (or (and (= |ULTIMATE.start_main_~d~0#1| 1) (<= ~last~0 199999) (= |v_ULTIMATE.start_main_~st~0#1_261| 1)) (and (or (< 199999 ~last~0) (not (= |v_ULTIMATE.start_main_~st~0#1_261| 1))) (= |ULTIMATE.start_main_~d~0#1| 0) (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_48|))) (= |v_ULTIMATE.start_main_~a~0#1_49| |v_ULTIMATE.start_main_~a~0#1_48|) (or (not (= ~last~0 |v_ULTIMATE.start_main_~c~0#1_438|)) (not (= |v_ULTIMATE.start_main_~st~0#1_261| 0)))) (and (= ~last~0 |v_ULTIMATE.start_main_~c~0#1_438|) (= |v_ULTIMATE.start_main_~st~0#1_261| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_48|) (= (+ |v_ULTIMATE.start_main_~a~0#1_48| 1) |v_ULTIMATE.start_main_~a~0#1_49|))) (= |ULTIMATE.start_main_~a~0#1| |v_ULTIMATE.start_main_~a~0#1_49|) (or (and (= |v_ULTIMATE.start_main_~b~0#1_40| 3) (= |v_ULTIMATE.start_main_~st~0#1_261| 0) (= 3 |v_ULTIMATE.start_main_~a~0#1_48|) (= |v_ULTIMATE.start_main_~c~0#1_438| (+ ~last~0 1))) (and (or (not (= |v_ULTIMATE.start_main_~st~0#1_261| 0)) (not (= |v_ULTIMATE.start_main_~c~0#1_438| (+ ~last~0 1)))) (= |v_ULTIMATE.start_main_~b~0#1_40| 2) (= 2 |v_ULTIMATE.start_main_~a~0#1_48|))) (<= |v_ULTIMATE.start_main_~st~0#1_261| 1) (<= 200000 |v_ULTIMATE.start_main_~c~0#1_438|))) (<= ~last~0 2147483647))' at error location [2024-11-13 23:32:18,340 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:32:18,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:32:18,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 288 [2024-11-13 23:32:18,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405770601] [2024-11-13 23:32:18,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:32:18,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 289 states [2024-11-13 23:32:18,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:32:18,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 289 interpolants. [2024-11-13 23:32:18,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36883, Invalid=48673, Unknown=0, NotChecked=0, Total=85556 [2024-11-13 23:32:18,359 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 289 states, 289 states have (on average 1.0103806228373702) internal successors, (292), 288 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:32:30,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:32:30,889 INFO L93 Difference]: Finished difference Result 297 states and 395 transitions. [2024-11-13 23:32:30,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2024-11-13 23:32:30,890 INFO L78 Accepts]: Start accepts. Automaton has has 289 states, 289 states have (on average 1.0103806228373702) internal successors, (292), 288 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2024-11-13 23:32:30,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:32:30,891 INFO L225 Difference]: With dead ends: 297 [2024-11-13 23:32:30,891 INFO L226 Difference]: Without dead ends: 197 [2024-11-13 23:32:30,903 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 386 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56237 ImplicationChecksByTransitivity, 34.4s TimeCoverageRelationStatistics Valid=55408, Invalid=94748, Unknown=0, NotChecked=0, Total=150156 [2024-11-13 23:32:30,904 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 204 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 23:32:30,905 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 25 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 23:32:30,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-11-13 23:32:30,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2024-11-13 23:32:30,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:32:30,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2024-11-13 23:32:30,939 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 99 [2024-11-13 23:32:30,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:32:30,940 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2024-11-13 23:32:30,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 289 states, 289 states have (on average 1.0103806228373702) internal successors, (292), 288 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:32:30,940 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2024-11-13 23:32:30,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2024-11-13 23:32:30,945 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:32:30,945 INFO L215 NwaCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1] [2024-11-13 23:32:30,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 23:32:31,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-13 23:32:31,145 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:32:31,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:32:31,146 INFO L85 PathProgramCache]: Analyzing trace with hash 821358631, now seen corresponding path program 7 times [2024-11-13 23:32:31,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:32:31,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198810097] [2024-11-13 23:32:31,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:32:31,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:32:31,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:32:54,702 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:32:54,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:32:54,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198810097] [2024-11-13 23:32:54,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198810097] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:32:54,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094923099] [2024-11-13 23:32:54,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 23:32:54,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:32:54,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:32:54,704 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:32:54,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 23:32:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:32:54,900 INFO L255 TraceCheckSpWp]: Trace formula consists of 805 conjuncts, 193 conjuncts are in the unsatisfiable core [2024-11-13 23:32:54,915 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:33:13,115 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:33:13,115 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:34:05,372 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:34:05,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094923099] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:34:05,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1645138550] [2024-11-13 23:34:05,374 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-13 23:34:05,374 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:34:05,375 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:34:05,375 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:34:05,375 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:34:05,493 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:34:06,979 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5932#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~last~0) (= ~SIZE~0 200000) (<= ~last~0 2147483647) (exists ((|v_ULTIMATE.start_main_~st~0#1_456| Int) (|v_ULTIMATE.start_main_~a~0#1_48| Int) (|v_ULTIMATE.start_main_~c~0#1_824| Int) (|v_ULTIMATE.start_main_~b~0#1_40| Int) (|v_ULTIMATE.start_main_~a~0#1_49| Int) (|v_ULTIMATE.start_main_#t~post6#1_50| Int)) (and (<= |v_ULTIMATE.start_main_~st~0#1_456| 1) (= |v_ULTIMATE.start_main_~b~0#1_40| |ULTIMATE.start_main_~b~0#1|) (or (not (= |v_ULTIMATE.start_main_~c~0#1_824| 200000)) (not (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (= |ULTIMATE.start_main_~a~0#1| |v_ULTIMATE.start_main_~a~0#1_49|) (<= 200000 |v_ULTIMATE.start_main_~c~0#1_824|) (or (and (= |v_ULTIMATE.start_main_~c~0#1_824| (+ ~last~0 1)) (= |v_ULTIMATE.start_main_~st~0#1_456| 0) (= |v_ULTIMATE.start_main_~b~0#1_40| 3) (= 3 |v_ULTIMATE.start_main_~a~0#1_48|)) (and (= |v_ULTIMATE.start_main_~b~0#1_40| 2) (= 2 |v_ULTIMATE.start_main_~a~0#1_48|) (or (not (= |v_ULTIMATE.start_main_~c~0#1_824| (+ ~last~0 1))) (not (= |v_ULTIMATE.start_main_~st~0#1_456| 0))))) (or (and (= |v_ULTIMATE.start_main_~st~0#1_456| 0) (= ~last~0 |v_ULTIMATE.start_main_~c~0#1_824|) (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_50|) (= |ULTIMATE.start_main_~d~0#1| 0) (= (+ |v_ULTIMATE.start_main_~a~0#1_48| 1) |v_ULTIMATE.start_main_~a~0#1_49|)) (and (or (not (= |v_ULTIMATE.start_main_~st~0#1_456| 0)) (not (= ~last~0 |v_ULTIMATE.start_main_~c~0#1_824|))) (or (and (= |ULTIMATE.start_main_~d~0#1| 1) (= |v_ULTIMATE.start_main_~st~0#1_456| 1) (<= ~last~0 199999)) (and (or (< 199999 ~last~0) (not (= |v_ULTIMATE.start_main_~st~0#1_456| 1))) (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_50|) (= |ULTIMATE.start_main_~d~0#1| 0))) (= |v_ULTIMATE.start_main_~a~0#1_49| |v_ULTIMATE.start_main_~a~0#1_48|))))))' at error location [2024-11-13 23:34:06,979 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:34:06,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:34:06,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 576 [2024-11-13 23:34:06,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325317539] [2024-11-13 23:34:06,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:34:06,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 577 states [2024-11-13 23:34:06,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:34:07,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 577 interpolants. [2024-11-13 23:34:07,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147475, Invalid=189505, Unknown=0, NotChecked=0, Total=336980 [2024-11-13 23:34:07,013 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand has 577 states, 577 states have (on average 1.0051993067590987) internal successors, (580), 576 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:34:57,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:34:57,737 INFO L93 Difference]: Finished difference Result 585 states and 779 transitions. [2024-11-13 23:34:57,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 385 states. [2024-11-13 23:34:57,739 INFO L78 Accepts]: Start accepts. Automaton has has 577 states, 577 states have (on average 1.0051993067590987) internal successors, (580), 576 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2024-11-13 23:34:57,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:34:57,741 INFO L225 Difference]: With dead ends: 585 [2024-11-13 23:34:57,742 INFO L226 Difference]: Without dead ends: 389 [2024-11-13 23:34:57,760 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 967 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 770 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223085 ImplicationChecksByTransitivity, 136.0s TimeCoverageRelationStatistics Valid=221392, Invalid=373820, Unknown=0, NotChecked=0, Total=595212 [2024-11-13 23:34:57,761 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 396 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 23:34:57,761 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 41 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 23:34:57,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2024-11-13 23:34:57,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 389. [2024-11-13 23:34:57,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 1.0051546391752577) internal successors, (390), 388 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:34:57,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 390 transitions. [2024-11-13 23:34:57,799 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 390 transitions. Word has length 195 [2024-11-13 23:34:57,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:34:57,800 INFO L471 AbstractCegarLoop]: Abstraction has 389 states and 390 transitions. [2024-11-13 23:34:57,801 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 577 states, 577 states have (on average 1.0051993067590987) internal successors, (580), 576 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:34:57,801 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 390 transitions. [2024-11-13 23:34:57,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2024-11-13 23:34:57,813 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:34:57,814 INFO L215 NwaCegarLoop]: trace histogram [382, 1, 1, 1, 1, 1] [2024-11-13 23:34:57,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 23:34:58,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-13 23:34:58,014 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:34:58,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:34:58,015 INFO L85 PathProgramCache]: Analyzing trace with hash -207091673, now seen corresponding path program 8 times [2024-11-13 23:34:58,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:34:58,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811021898] [2024-11-13 23:34:58,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:34:58,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:34:59,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:36:32,721 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:36:32,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:36:32,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811021898] [2024-11-13 23:36:32,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811021898] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:36:32,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139360999] [2024-11-13 23:36:32,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:36:32,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:36:32,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:36:32,725 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:36:32,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea21d2f-bb68-460f-ada3-88e15e8c806b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 23:36:36,338 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 192 check-sat command(s) [2024-11-13 23:36:36,338 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:36:36,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 1573 conjuncts, 385 conjuncts are in the unsatisfiable core [2024-11-13 23:36:36,377 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:37:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:37:51,108 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:41:55,348 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:41:55,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139360999] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:41:55,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1520874104] [2024-11-13 23:41:55,350 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-13 23:41:55,350 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:41:55,350 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:41:55,350 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:41:55,351 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:41:55,478 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:41:57,975 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11721#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~last~0) (= ~SIZE~0 200000) (<= ~last~0 2147483647) (exists ((|v_ULTIMATE.start_main_#t~post6#1_52| Int) (|v_ULTIMATE.start_main_~st~0#1_843| Int) (|v_ULTIMATE.start_main_~a~0#1_48| Int) (|v_ULTIMATE.start_main_~b~0#1_40| Int) (|v_ULTIMATE.start_main_~a~0#1_49| Int) (|v_ULTIMATE.start_main_~c~0#1_1594| Int)) (and (<= 200000 |v_ULTIMATE.start_main_~c~0#1_1594|) (or (and (or (not (= |v_ULTIMATE.start_main_~c~0#1_1594| ~last~0)) (not (= |v_ULTIMATE.start_main_~st~0#1_843| 0))) (= |v_ULTIMATE.start_main_~a~0#1_49| |v_ULTIMATE.start_main_~a~0#1_48|) (or (and (= |ULTIMATE.start_main_~d~0#1| 1) (= |v_ULTIMATE.start_main_~st~0#1_843| 1) (<= ~last~0 199999)) (and (or (< 199999 ~last~0) (not (= |v_ULTIMATE.start_main_~st~0#1_843| 1))) (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_52|) (= |ULTIMATE.start_main_~d~0#1| 0)))) (and (= |v_ULTIMATE.start_main_~c~0#1_1594| ~last~0) (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_52|) (= |v_ULTIMATE.start_main_~st~0#1_843| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= (+ |v_ULTIMATE.start_main_~a~0#1_48| 1) |v_ULTIMATE.start_main_~a~0#1_49|))) (= |v_ULTIMATE.start_main_~b~0#1_40| |ULTIMATE.start_main_~b~0#1|) (or (not (= |v_ULTIMATE.start_main_~c~0#1_1594| 200000)) (not (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (= |ULTIMATE.start_main_~a~0#1| |v_ULTIMATE.start_main_~a~0#1_49|) (or (and (= |v_ULTIMATE.start_main_~b~0#1_40| 3) (= |v_ULTIMATE.start_main_~st~0#1_843| 0) (= 3 |v_ULTIMATE.start_main_~a~0#1_48|) (= |v_ULTIMATE.start_main_~c~0#1_1594| (+ ~last~0 1))) (and (or (not (= |v_ULTIMATE.start_main_~st~0#1_843| 0)) (not (= |v_ULTIMATE.start_main_~c~0#1_1594| (+ ~last~0 1)))) (= |v_ULTIMATE.start_main_~b~0#1_40| 2) (= 2 |v_ULTIMATE.start_main_~a~0#1_48|))) (<= |v_ULTIMATE.start_main_~st~0#1_843| 1))))' at error location [2024-11-13 23:41:57,975 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:41:57,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:41:57,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [385, 385, 385] total 1152 [2024-11-13 23:41:57,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902321686] [2024-11-13 23:41:57,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:41:57,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 1153 states [2024-11-13 23:41:57,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:41:58,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 1153 interpolants. [2024-11-13 23:41:58,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=589843, Invalid=747649, Unknown=0, NotChecked=0, Total=1337492 [2024-11-13 23:41:58,079 INFO L87 Difference]: Start difference. First operand 389 states and 390 transitions. Second operand has 1153 states, 1153 states have (on average 1.002601908065915) internal successors, (1156), 1152 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)